^ you must really be devoted to AMD. lemme see if i can sway your opinion a little.
if you're particularly interested in eVGA and AMD, you're most likely interested in SLi (since the only eVGA AM2 motherboards are SLi, specifically nVidia 590 chipset). looking around on newegg:
... eVGA 122-M2-NF59-TR: US$129 -> AM2, DDR2-800, 2x PCI-e x16, nVidia nForce 590
... ASUS P5N-E SLI: US$125 -> LGA775, DDR2-800, 2x PCI-e x8, nVidia nForce 650i
both of these boards offer SLi support, where the eVGA/590 does x16+x16 and the ASUS/650i does x8+x8. even though the ASUS/650i is only x8+x8, both of them run directly through the northbridge, whereas with the eVGA/590, the first x16 runs through the northbridge, while the second x16 runs bottlenecked through the southbridge. because of this, the x8+x8 has proven to be just as fast as x16+x16 (on a head-to-head 650i vs 680i comparison).
these two boards are pretty much the same price at the moment. depending on how much you intend to spend on your CPU, either system could perform well. if you want to stay on the budget end, AMD is probably better, since the X2 3800+ is very cheap and will overclock a little. but if you want to go up to midrange, you're better off with an Intel E6300 because it overclocks extremely well.
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of course, if you don't intend on doing SLi, the above is relatively pointless. freeing yourself from SLi gives you any number of possibilities between AMD, Intel, and nVidia, and in all honesty, it's probably not worth trying to clarify all of the complicated factors if you are already biased towards AMD. but if getting good performance important, you may want to consider this:
... Gigabyte GA-965P-DS3: US$110 -> LGA775, DDR2-800, PCI-e x16, Intel P965
... Intel Core 2 Duo E4300: US$170 -> 1.8GHz, 800MHz FSB
the E4300 may not seem very impressive at first, but it's incredibly flexible when overclocking: anandtech was able to overclock it to 3.38GHz! looking at the results, the overclocked E4300 performs as well as the E6600 (US$310), and in some cases as well as the X6800 (US$980)! you can look around for reviews and comparisons, but the performance of an E6600 or X6800 is already far beyond the performance of the AMD X2 5000+ which sells for the same price (US$170). you have to understand that with this, you'd have to spend
more on AMD to get the same performance with Intel.
anyway that's just a little note for you to mull over. if you're interested, here's the anandtech article:
http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=2903&p=2